Acu-Math No 150 slide* rule with Case F*S

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Acu-math 150 - Log Log Decimal Trig, Black substrate - pre 1968
With Original Case - Very Good Condition
Made in USA by Acumath
Front Scale
LL01, K, A [ B, T, ST, S ] D, L, LL1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2

Made in the USA  

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